朗科恩（Runcorn）是英国的一座城市，位于柴郡。在2010年，朗科恩的人口估计有61,000人。

朗科恩是一座工业都市，位于默西河的河口处。这里的交通发达。朗科恩火车站位于西海岸本线的支在线，有开往伦敦、利物浦和伯明翰的列车。朗科恩市内有多座大桥。朗科恩在工业革命之前都只是个小村庄。在18世纪末至19世纪初期，朗科恩是座疗养胜地。在18世纪后期，默西河南岸开始建设港口。19世纪时期，肥皂等产业开始发展。20世纪初则发展了化工产业。目前产业则趋于多样化。

市区的东部建设了新市镇，人口也因此大幅增加。朗科恩的地标有市中心的哈尔顿城堡。水塔也是朗科恩著名的地标。朗科恩艺术中心位于市中心，内有多用途剧场和展览室。

Runcorn is an industrial town and cargo port in Cheshire, England, located within the Borough of Halton. In 2010, Runcorn's population was recorded to be 61,000. In May 2014, it became a member of the Liverpool City Region Combined Authority. The town is on the southern bank of the River Mersey, where the estuary narrows to form the Runcorn Gap. Directly to the north across the River Mersey is the town of Widnes. Upstream and 8 miles (12.9 km) to the northeast is the town of Warrington, and downstream 16 miles (26 km) to the west is the city of Liverpool.